- Putin warns West: Moscow has ‘red line’ about Ukraine, NATOAssociated Press
- Russia would pay ‘high price’ for Ukraine attack, warns NATOReuters
- Russia’s military buildup has Ukraine and NATO on edgeYahoo News
- NATO, Russia spar as foreign ministers meet in LatviaAl Jazeera English
- Putin warns NATO not to deploy troops or weapons to UkraineFox News